mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-27 05:23:34 +00:00
61c1775f16
Add the tca642x gpio expander driver Datasheet: http://www.ti.com/product/tca6424a Signed-off-by: Dan Murphy <dmurphy@ti.com>
69 lines
2 KiB
C
69 lines
2 KiB
C
/*
|
|
* Copyright 2013 Texas Instruments, Inc.
|
|
* Author: Dan Murphy <dmurphy@ti.com>
|
|
*
|
|
* Derived work from the pca953x.c driver
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef __TCA642X_H_
|
|
#define __TCA642X_H_
|
|
|
|
#ifdef CONFIG_CMD_TCA642X
|
|
enum {
|
|
TCA642X_CMD_INFO,
|
|
TCA642X_CMD_DEVICE,
|
|
TCA642X_CMD_OUTPUT,
|
|
TCA642X_CMD_INPUT,
|
|
TCA642X_CMD_INVERT,
|
|
};
|
|
#endif
|
|
|
|
#define TCA642X_OUT_LOW 0
|
|
#define TCA642X_OUT_HIGH 1
|
|
#define TCA642X_POL_NORMAL 0
|
|
#define TCA642X_POL_INVERT 1
|
|
#define TCA642X_DIR_OUT 0
|
|
#define TCA642X_DIR_IN 1
|
|
|
|
/* Default to an address that hopefully won't corrupt other i2c devices */
|
|
#ifndef CONFIG_SYS_I2C_TCA642X_ADDR
|
|
#define CONFIG_SYS_I2C_TCA642X_ADDR (~0)
|
|
#endif
|
|
|
|
/* Default to an address that hopefully won't corrupt other i2c devices */
|
|
#ifndef CONFIG_SYS_I2C_TCA642X_BUS_NUM
|
|
#define CONFIG_SYS_I2C_TCA642X_BUS_NUM (0)
|
|
#endif
|
|
|
|
struct tca642x_bank_info {
|
|
uint8_t input_reg;
|
|
uint8_t output_reg;
|
|
uint8_t polarity_reg;
|
|
uint8_t configuration_reg;
|
|
};
|
|
|
|
int tca642x_set_val(uchar chip, uint8_t gpio_bank,
|
|
uint8_t reg_bit, uint8_t data);
|
|
int tca642x_set_pol(uchar chip, uint8_t gpio_bank,
|
|
uint8_t reg_bit, uint8_t data);
|
|
int tca642x_set_dir(uchar chip, uint8_t gpio_bank,
|
|
uint8_t reg_bit, uint8_t data);
|
|
int tca642x_get_val(uchar chip, uint8_t gpio_bank);
|
|
int tca642x_set_inital_state(uchar chip, struct tca642x_bank_info init_data[]);
|
|
|
|
#endif /* __TCA642X_H_ */
|